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11-03-2005, 11:19 AM
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#1 |
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Registered User
Join Date: Mar 2005
Location: Just outside Durham, NC
Posts: 894
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I6 Tbi??
I have been searching high and low, and have yet to come across anything or one who can give me any information about putting a tbi setup on an I6 chevy....250 specifically......short of building a megasquirt stand alone fuel management system and programming the whole thing by hand, does anyone know of any companies that have done this (or people that may have already setup something like this?)
I have read a bunch of the holley information, but it all states v6 and v8 applications, is this going to be compatable? Any direction would be appreciated....can I retrofit a v8 computer.....any companies specialize in this tuning? Someone said I can use a 4.3 ecu and that should be 'good enough' because they are similar displacements.....but displacement does not the engine make, was hoping for a little insight from someone more knowledgeable. Yes, I did check inliners.org......was unable to find anything, if i missed it, please let me know |
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11-03-2005, 02:02 PM
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#2 |
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State of Confusion!
  
Join Date: Jul 2002
Location: Gulfport, MS USA
Posts: 46,819
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Re: I6 Tbi??
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Bill 1970 Chevy Custom/10 LWB Fleetside 2010 Toyota Tacoma PreRunner SR5 Double Cab - DD Member of Louisiana Classic Truck Club (LCTC) Bill's Gallery Life isn't tied with a bow, but it's still a gift. Live simply. Love generously. Care deeply. Speak kindly. Leave the rest to God! |
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11-03-2005, 05:35 PM
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#3 |
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Registered User
Join Date: Mar 2005
Location: minnesota
Posts: 78
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Re: I6 Tbi??
The problem with the I6 and TBI is that the 4.3 V6 distributor will not drop in the older I6 chevy motor without some serious machining and/or redesigning. All is not lost though, you could easily weld the dizzy on the 250 and disconnect the vacuum advance so it doesn't advance/retard anymore, and wire the HEI trigger to a TBI ECM. All TBI ECM's use the dizzy to trigger the injectors and keep track of engine speed, and accordingly adjust when the coil is fired to change the advance/retard.
On a related note, the megasquirt EFI unit doesn't control spark unless an additional module (megajolt) is added. I've heard of/seen people welding the dizzy to use the 1227747 ECM (87-91 TBI Trucks, blazers, burbs and some cars) on different non-GM cars, including porsche and nissan. |
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11-03-2005, 06:09 PM
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#4 |
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Junior Member
Join Date: Mar 2005
Location: Maryland
Posts: 129
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Howell engine development
Check with these guys. They set me up on my 383 and they do jeep I6 stuff. I bet they have done a Chev I6 as well.
http://www.howell-efi.com/ck_tbi_index.html Scott
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'67 SWB big block project '85 C60 school bus motorhome conversion |
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11-03-2005, 06:12 PM
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#5 |
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Registered User
Join Date: Jan 2005
Location: Colorado Springs
Posts: 693
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Re: I6 Tbi??
Why not just use the Holley Pro Injection its just an aftermarket TBI
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1971 GMC K1500 SWB Fleetside, 4" skyjacker softride and, 14 Bolt FF, HD Dana 44 4.10's 1970 K5 TBI conversion lifted etc SOLD 1968 C20 camper truck SOLD “To ban guns because criminals use them is to tell the innocent and law-abiding that their rights and liberties depend not on their own conduct, but on the conduct of the guilty and the lawless.” Jeff Snyder |
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11-03-2005, 09:17 PM
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#6 |
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Registered User
Join Date: Feb 2001
Location: Wetumpka, Al, U.S.
Posts: 8,891
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Re: I6 Tbi??
Yes call Troy Brown at Howell! He's the man on TBI!
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Kevin Special Thanks to All who have helped on the TRUCK! My Pass Time Show http://s129.photobucket.com/albums/p...Chapter1-0.mp4 So Far my best Times are: Motor only: 6.44 1/8 @ 104.13 10.39 1/4 @ 125.83 Nitrous Times: 5.785 1/8 @ 118.65 with a 1.336 60ft 9.168 1/4 @ 142.58 with a 250 shot dead out of the hole! |
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